Version 1.0
Published May 2019
Copyright©2019 ASRock INC. All rights reser ved.
Copyright Notice:
No part of this documentation may be reproduced, transcribed, transmitted, or
translated in any language, in any form or by any means, except duplication of
documentation by the purchaser for backup purpose, without written consent of
ASRock Inc.
Products and corporate names appearing in this documentation may or may not
be registered trademarks or copyrights of their respective companies, and are used
only for identication or explanation and to the owners’ benet, without intent to
infringe.
Disclaimer:
Specications and information contained in this documentation are furnished for
informational use only and subject to change without notice, and should not be
constructed as a commitment by ASRock. ASRock assumes no responsibility for
any errors or omissions that may appear in this documentation.
With respect to the contents of this documentation, ASRock does not provide
warranty of any kind, either expressed or implied, including but not limited to
the implied warranties or conditions of merchantability or tness for a particular
purpose.
In no event shall ASRock, its directors, ocers, employees, or agents be liable for
any indirect, special, incidental, or consequential damages (including damages for
loss of prots, loss of business, loss of data, interruption of business and the like),
even if ASRock has been advised of the possibility of such damages arising from any
defect or error in the documentation or product.
is device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
CALIFORNIA, USA ONLY
e Lithium battery adopted on this motherboard contains Perchlorate, a toxic substance
controlled in Perchlorate Best Management Practices (BMP) regulations passed by the
California Legislature. When you discard the Lithium battery in California, USA, please
follow the related regulations in advance.
“Perchlorate Material-special handling may apply, see ww w.dtsc.ca.gov/hazardouswaste/
perchlorate”
ASRock Website: http://www.asrock.com
AUSTRALIA ONLY
Our goods come with guarantees that cannot be excluded under the Australian
Consumer Law. You are entitled to a replacement or refund for a major failure and
compensation for any other reasonably foreseeable loss or damage caused by our
goods. You are also entitled to have the goods repaired or replaced if the goods fail
to be of acceptable quality and the failure does not amount to a major failure. If
you require assistance please call ASRock Tel : +886-2-28965588 ext.123 (Standard
International call charges apply)
e terms HDMI® and HDMI High-Denition Multimedia Interface, and the
HDMI logo are trademarks or registered trademarks of HDMI Licensing LLC in the
United States and other countries.
CE Warning
is device complies with directive 2014/53/EU issued by the Commision of the European
Community.
is equipment complies with EU radiation exposure limits set forth for an uncontrolled
environment.
is equipment should be installed and operated with minimum distance 20cm between
the radiator & your body.
Operations in the 5.15-5.35GHz band are restricted to indoor usage only.
Radio transmit power per transceiver ty pe
Function Frequency Maximum Output Power (EIRP)
2400-2483.5 MHz 18.5 + / -1.5 dbm
5150-5250 MHz 21.5 + / -1.5 dbm
WiFi
Bluetooth 2400-2483.5 MHz 8.5 + / -1.5 dbm
5250-5350 MHz
5470-5725 MHz
18.5 + / -1.5 dbm (no TPC)
21.5 + / -1.5 dbm (TPC)
25.5 + / -1.5 dbm (no TPC)
28.5 + / -1.5 dbm (TPC)
Contents
Chapter 1 Introduction 1
1.1 Package Contents 1
1.2 Specications 2
1.3 Motherboard Layout 7
1.4 I/O Panel 9
1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna 11
Chapter 2 Installation 13
2.1 Installing the CPU 14
2.2 Installing the CPU Fan and Heatsink 16
2.3 Installing Memory Modules (DIMM) 25
2.4 Expansion Slots (PCI Express Slots) 28
2.5 Jumpers Setup 29
2.6 Onboard Headers and Connectors 30
2.7 M.2_SSD (NGFF) Module Installation Guide (M2_1) 35
Chapter 3 Software and Utilities Operation 38
3.1 Installing Drivers 38
3.2 A-Tuning 39
3.2.1 Installing A-Tuning 39
3.2.2 Using A-Tuning 39
3.3 ASRock Live Update & APP Shop 42
3.3.1 UI Overview 42
3.3.2 Apps 43
3.3.3 BIOS & Drivers 46
3.3.4 Setting 47
3.5 ASRock Polychrome SYNC 48
Chapter 4 UEFI SETUP UTILITY 51
4.1 Introduction 51
4.1.1 UEFI Menu Bar 51
4.1.2 Navigation Keys 52
4.2 Main Screen 53
4.3 OC Tweaker Screen 54
4.4 Advanced Screen 57
4.4.1 CPU Conguration 58
4.4.2 North Bridge Conguration 59
4.4.3 South Bridge Conguration 60
4.4.4 Storage Conguration 61
4.4.5 ACPI Conguration 62
4.4.6 Trusted Computing 63
4.4.7 AMD CBS 64
4.4.8 AMD PBS 72
4.5 Tools 73
4.6 Hardware Health Event Monitoring Screen 74
4.7 Security Screen 76
4.8 Boot Screen 77
4.9 Exit Screen 79
Chapter 1 Introduction
ank you for purchasing ASRock B450M/ac motherboard, a reliable motherboard
produced under ASRock ’s consistently stringent quality control. It delivers excellent
performance with robust design conforming to ASRock ’s commitment to qualit y
and endurance.
In this manual, Chapter 1 and 2 contains the introduction of the motherboard
and step-by-step installation guides. Chapter 3 contains the operation guide of the
soware and utilities. Chapter 4 contains the conguration guide of the BIOS setup.
Becau se the motherboard specications and the BIOS soware might be updated, the
content of this manual will be subject to change without notice. In ca se any modications of this manual occur, the updated version will be available on ASRock’s website
without further notice. If you require technical suppor t related to this motherboard,
please visit our website for spe cic information about the model you are using. You
may nd the l atest VGA cards and CPU suppor t list on ASRock’s website a s well.
ASRock website http://www.asrock.com.
1.1 Package Contents
ASRock B450M/ac Motherboard (Micro ATX Form Factor)
•
ASRock B450M/ac Quick Installation Guide
•
ASRock B450M/ac Support CD
•
1 x I/O Panel Shield
•
2 x Serial ATA (SATA) Data Cables (Optional)
•
2 x ASRock WiFi 2.4/5 GHz Antennas (Optional)
•
1 x Screw for M.2 Socket (Optional)
•
B450M/ac
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1.2 Specications
Platform
CPU
Chipset
Memory
•
•
•
•
•
•
•
•
•
•
•
•
* For Ryzen Series CPUs (Raven Ridge), ECC is only supported
with PRO CPUs.
* Please refer to Memory Support List on ASRock’s website for
more information. (http://www.asrock.com/)
* Please refer to page 24 for DDR4 UDIMM maximum frequency
support.
•
•
Micro ATX Form Factor
2oz Copper PCB
Solid Capacitor design
AMD AM4 Socket
Digi Power design
9 Power Phase design
AMD Promontory B450
Dual Channel DDR4 Memory Technology
4 x DDR4 DIMM Slots
AMD Ryzen series CPUs (Pinnacle Ridge) support DDR4
3200+(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-
buered memory*
AMD Ryzen series CPUs (Summit Ridge) support DDR4
3200+(OC)/2933(OC)/2667/2400/2133 ECC & non-ECC, un-
buered memory*
AMD Ryzen series CPUs (Raven Ridge) support DDR4
3200+(OC)/2933/2667/2400/2133 non-ECC, un-buered
memory*
Max. capacity of system memory: 64GB
15μ Gold Contact in DIMM Slots
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Expansion
Slot
AMD Ryzen series CPUs (Summit Ridge and Pinnacle Ridge)
1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
•
AMD Ryzen series CPUs (Raven Ridge)
1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
•
Graphics
AMD Athlon series CPUs
1 x PCI Express 3.0 x16 Slot (PCIE1: x4 mode)*
•
1 x PCI Express 2.0 x16 Slot (PCIE2: x4 mode)
•
* Supports NVMe SSD as boot disks
Supports AMD Quad CrossFireXTM and CrossFireX
•
1 x Vertical M.2 Socket (Key E) with the bundled WiFi-
•
802.11ac module (on the rear I/O)
Integrated AMD RadeonTM Vega Series Graphics in Ryzen
•
Series APU*
* Actual support may vary by CPU
DirectX 12, Pixel Shader 5.0
•
Shared memory default 2GB. Max Shared memory supports
•
up to 16GB.
* e Max shared memory 16GB requires 32GB system memory
installed.
Supports HDMI with max. resolution up to 4K x 2K
•
(4096x2160) @ 24Hz / (3840x2160) @ 30Hz
Supports Auto Lip Sync, Deep Color (12bpc), xvYCC and
•
HBR (High Bit Rate Audio) with HDMI 1.4 Port (Compliant
HDMI monitor is required)
Supports HDCP 1.4 with HDMI 1.4 Port
•
Supports 4K Ultra HD (UHD) playback with HDMI 1.4 Port
•
TM
B450M/ac
Audio
LAN
7.1 CH HD Audio with Content Protection (Realtek ALC892
•
Audio Codec)
Premium Blu-ray Audio support
•
Supports Surge Protection
•
ELNA Audio Caps
•
PCIE x1 Gigabit LAN 10/100/1000 Mb/s
•
Realtek RTL8111H
•
Supports Wake-On-LAN
•
Supports Lightning/ESD Protection
•
Supports Energy Ecient Ethernet 802.3az
•
Supports PXE
•
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Wireless
LAN
Rear Panel
I/O
Storage
Connector
Intel® 802.11ac WiFi Module
•
Supports IEEE 802.11a/b/g/n/ac
•
Supports Dual-Band (2.4/5 GHz)
•
Supports high speed wireless connections up to 433Mbps
•
Supports Bluetooth 4.2 / 3.0 + High speed class II
•
2 x Antenna Ports
•
1 x HDMI Port
•
2 x USB 2.0 Ports (Supports ESD Protection)
•
4 x USB 3.2 Gen1 Ports (Supports ESD Protection)
•
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED
•
LED)
HD Audio Jacks: Line in / Front Speaker / Microphone
•
4 x SATA3 6.0 Gb/s Connectors, support RAID (RAID 0,
•
RAID 1 and RAID 10), NCQ, AHCI and Hot Plug
1 x Ultra M.2 Socket (M2_1), supports M Key type
•
2242/2260/2280 M.2 PCI Express module up to Gen3 x4 (32
Gb/s) (with Summit Ridge, Raven Ridge and Pinnacle Ridge)
or Gen3 x2 (16 Gb/s) (with Athlon 2xxGE series APU)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
1 x Chassis Intrusion Header
•
1 x Power LED and Speaker Header
•
1 x RGB LED Header
•
* Supports in total up to 12V/3A, 36W LED Strip
1 x Addressable LED Header
•
* Supports in total up to 5V/3A, 15W LED Strip
1 x AMD Fan LED Header
•
*e AMD Fan LED Header supports LED strips of maximum
load of 3A (36W) and length up to 2.5M.
1 x CPU Fan Connector (4-pin)
•
* e CPU Fan Connector supports the CPU fan of ma ximum
1A (12W) fan power.
4
BIOS
Feature
1 x Chassis Fan Connector (3-pin)
•
* e Chassis Fan Connector supports the chassis fan of
maximum 1A (12W) fan power.
1 x Chassis/Water Pump Fan Connector (4-pin) (Smart Fan
•
Speed Control)
* e Chassis/Water Pump Fan supports the water cooler fan of
maximum 2A (24W) fan power.
* CHA_FAN1 can auto detect if 3-pin or 4-pin fan is in use.
1 x 24 pin ATX Power Connector
•
1 x 8 pin 12V Power Connector
•
1 x Front Panel Audio Connector
•
1 x AMD LED Fan USB Header
•
2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD
•
Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports)
•
(Supports ESD Protection)
AMI UEFI Legal BIOS with multilingual GUI support
•
Supports “Plug and Play”
•
ACPI 5.1 compliance wake up events
•
Supports jumperfree
•
SMBIOS 2.3 support
•
DRAM Voltage multi-adjustment
•
B450M/ac
Hardware
Monitor
OS
Certications
Temperature Sensing: CPU, Chassis, Chassis/Water Pump
•
Fans
Fan Tachometer: CPU, Chassis, Chassis/Water Pump Fans
•
Quiet Fan (Auto adjust chassis fan speed by CPU tempera-
•
ture): CPU, Chassis, Chassis/Water Pump Fans
Fan Multi-Speed Control: CPU, Chassis, Chassis/Water
•
Pump Fans
CASE OPEN detection
•
Voltage monitoring: +12V, +5V, +3.3V, Vcore
•
Microso® Windows® 10 64-bit
•
FCC, CE
•
ErP/EuP ready (ErP/EuP ready power supply is required)
•
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* For detailed product information, please visit our website: http://www.asrock .com
Please realiz e that the re is a certain r isk involved with o verclocking, including adjusting the setting in the BIOS, applying Untied Ove rclocking Technology, or using thirdparty o verclocking tools. Overclocking may aect your syste m’s stability, or even cause
damage to the components and dev ices of your system. It should be done at your own
risk and expe nse. We are not responsible for possible damage cau sed by overclocking.
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1.3 Motherboard Layout
5
10
1
14
12
11
ATXPWR1
Sup er
I/O
CLRCMOS1
1
PCIE1
1
USB_3_4
HD_AUDIO1
1
CPU_FAN1
Top:
LINE IN
Center :
FRONT
Bottom :
MIC IN
RJ- 45 LAN
USB 2.0
T: USB1
B: USB2
SOCKETAM4
CMOS
Battery
ATX12V1
M2_1
Ultra M.2
PCIe Gen3x4
USB3_5 _6
1
CHA_FAN1
CHA_FAN2
HDLED RESET
PLED PWRBTN
PANEL1
1
RoHS
SPK_PLED1
1
DDR4 _A1 (64 b it, 288 -pin mo dule)
DDR4 _A2 (64 b it, 288 -pin mo dule)
DDR4 _B1 (64 b it, 288 -pin mo dule)
DDR4 _B2 (64 b it, 288 -pin mo dule)
PCIE2
AMD
Promontory
B450
USB 3.2 Gen1
T: USB1
B: USB2
USB 3.2 Gen1
T: USB3
B: USB4
1
AMD_FAN_LED1
1
USB_7
1
M2_1_CT3M2_1_CT2M 2_1_CT1
1
USB_5_6
SATA3_3
SATA3_4
SATA3_1
SATA3_2
23
HDMI 1
M2_WIFI
ADDR_LED1
1
RGB_HEADER1
B450M/ac
CI1
15
B450M/ac
3
2
4
6
7
8
9
BIOS
ROM
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No. Description
1 ATX 12V Power Connector (ATX12V1)
2 CPU Fan Connector (CPU_FAN1)
3 2 x 288-pin DDR4 DIMM Slots (DDR4_A1, DDR4_B1)
4 2 x 288-pin DDR4 DIMM Slots (DDR4_A2, DDR4_B2)
5 AMD Fan LED Header (AMD_FAN_LED1)
6 ATX Power Connector (ATXPWR1)
7 USB 3.2 Gen1 Header (USB3_ 5_6)
8 AMD LED Fan USB Header (USB_7)
9 SATA3 Connector (SATA3_3)
10 SATA3 C onnector (SATA3 _4)
11 SATA3 Connector (SATA3_2)
12 SATA3 Connector (SATA3_1)
13 System Panel Header (PANEL1)
14 Power LED and Speaker Header (SPK_PLED1)
15 Chassis Intrusion Header (CI1)
16 Chassis Fan Connector (CHA_FAN2)
17 USB 2.0 Header (USB_ 3_4)
18 USB 2.0 Header (USB_ 5_6)
19 Clear CMOS Jumper (CLRCMOS1)
20 RGB LED Header (RGB_HEADER1)
21 Addressable LED Header (ADDR_LED1)
22 Front Panel Audio Header (HD_AUDIO1)
23 Chassis/Water Pump Fan Connector (CHA_FAN1)
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1.4 I/O Panel
B450M/ac
2
1
3
6 589 7
No. Description No. Description
1 LAN RJ-45 Port* 6 USB 3.2 Gen1 Ports (USB3_1_2)
2 Line In (Light Blue)** 7 HDMI Port
3 Front Speaker (Lime)** 8 USB 2.0 Ports (USB_1_2)
4 Microphone (Pink)** 9 Antenna Ports
5 USB 3.2 Gen1 Ports (USB3_3_4)
* ere are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications.
ACT/LINK LED
SPEED LED
LAN Por t
Activity / Link LED Speed LED
Status Description Status Description
O No Link O 10Mbps connection
Blinking Data Activity Orange 100Mbps connection
On Link Green 1Gbps connection
4
** Function of the Audio Ports in 7.1-channel Conguration:
Port Function
Light Blue (Rear panel) Rear Speaker Out
Lime (Rear panel) Front Speaker Out
Pink (Rear panel) Central /Subwoofer Speaker Out
Lime (Front panel) Side Speaker Out
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1.5 WiFi-802.11ac Module and ASRock WiFi 2.4/5 GHz
Antenna
WiFi-802.11ac + BT Module
is motherboard comes with an exclusive WiFi 802.11 a/b/g/n/ac + BT v4.2
module (pre-installed on the rear I/O panel) that oers support for WiFi 802.11 a/b/
g/n/ac connectivity standards and Bluetooth v4.2. WiFi + BT module is an easy-to-
use wireless local area network (WLAN) adapter to support WiFi + BT. Bluetooth
v4.2 standard features Smart Ready technology that adds a whole new class of
functionality into the mobile devices. BT 4.2 also includes Low Energy Technolog y
and ensures extraordinary low power consumption for PCs.
* e transmission speed may vary according to the environment.
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WiFi Antennas Installation Guide
B450M/ac
Step 1
Prepare the WiFi 2.4/5 GHz Antennas that come
with the package.
Step 2
Connect the two WiFi 2.4/5 GHz Antennas to
the antenna connectors. Turn the antenna clock-
wise until it is securely connected.
Step 3
Set the WiFi 2.4/5 GHz Antenna as shown in the
illustration.
*You may need to adjust the direction of
the antenna for a stronger signal.
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Chapter 2 Installation
is is a Micro ATX form factor motherboard. Before you install the motherboard,
study the conguration of your chassis to ensure that the motherboard ts into it.
Pre-installation Precautions
Take note of the following precautions before you install motherboard components
or change any motherboard settings.
Make sure to unplug the power cord before installing or removing the motherboard.
•
Failure to do so may cause physical injuries to you and damages to motherboard
components.
In order to avoid damage from static electricity to the motherboard’s components,
•
NEVER place your motherboard directly on a carpet. Also remember to use a grounded
wrist strap or touch a safety grounded object before you handle the components.
Hold components by the edges and do not touch the ICs.
•
Whenever you uninstall any components, place them on a grounded anti-static pad or
•
in the bag that comes with the components.
When placing screws to secure the motherboard to the chassis, please do not over-
•
tighten the screws! Doing so may damage the motherboard.
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2.1 Installing the CPU
Unplug all power cables be fore installing the CPU.
1
B450M/ac
2
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3
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2.2 Installing the CPU Fan and Heatsink
Aer you install the CPU into this motherboard, it is necessary to install a larger
heatsink and cooling fan to dissipate heat. You also need to spray thermal grease
between the CPU and the heatsink to improve heat dissipation. Ma ke sure that the
CPU and the heatsink are securely fastened and in good contact with each other.
Please turn o th e power or remove the power cord before changing a CPU or heatsink.
Installing the CPU Box Cooler SR1
1
B450M/ac
2
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3
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16
4
1
N
FA
_
U
P
C
Installing the AM4 Box Cooler SR2
1
B450M/ac
2
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3
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B450M/ac
4
1
N
FA
_
U
P
C
5
4-pin FAN cable
RGB LED Cable
1
FAN
CPU_
1
D
LE
_
N
FA
_
D
AM
+12V
*e diagram shown here are for reference only. Please refer to page 33 for the orientation of
AMD Fan LED Header (AMD_FAN_LED1).
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Installing the AM4 Box Cooler SR3
1
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2
B450M/ac
4
3
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